i like the format, but wish the options allowed for the following:
(1) turn the clock off. when your boss walks in your office/you get a customer call/etc. and you have to turn your attention away for a couple minutes, it is frustrating to come back to a "you lose" screen.
(2) increase the computer's skill level. it isn't even fun to play a game where the computer will always move the further piece without any regard to leaving pieces exposed or attempting to block reentry.

I started playing spider solitaire and came back to this just to see if it's improved and took about 8 minutes to play a game. Can't play it anymore. I agree with all of you and you are right, if you stop for a minute and come back, you are a loser. It's ok though, they put a block on our internet at work and can only get news now. I was getting addicted.